You need to be looking in bordering counties as well - Carlow and Laois.
I am researching the Holden family of Carlow. Michael is a common name in this family.
I have a baptism record for a James Holden born in Carlow 17/04/1848 to Michael Holden and Etty Page - their address is given as Potato Market.
I have all the Holden records for the Cathedral in Carlow and there are no more children born to this couple baptised there.
I think there is someone else on ancestry researching this particular family.